Nonequilibrium dynamics of optical-lattice-loaded Bose-Einstein-condensate atoms: Beyond the Hartree-Fock-Bogoliubov approximation

The nonequilibrium dynamics of a Bose-Einstein condensate selectively loaded into every third site of a one-dimensional optical lattice was discussed. A two-particle irreducible (2PI) closed-time-path (CTP) effective action was used for the purpose. Three different approximations under the 2PI CTP s...

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Guardado en:
Detalles Bibliográficos
Publicado: 2004
Materias:
Approximation theory
Atoms
Correlation methods
Eigenvalues and eigenfunctions
Hamiltonians
Light scattering
Mathematical operators
Parameter estimation
Perturbation techniques
Problem solving
Bose-Einstein condensates
Closed-time-path (CTP)
Optical lattices
Trapped atoms
Quantum theory
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v69_n3_p033610_Rey
http://hdl.handle.net/20.500.12110/paper_10502947_v69_n3_p033610_Rey
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The nonequilibrium dynamics of a Bose-Einstein condensate selectively loaded into every third site of a one-dimensional optical lattice was discussed. A two-particle irreducible (2PI) closed-time-path (CTP) effective action was used for the purpose. Three different approximations under the 2PI CTP scheme were considered. The comparisons between these approximations were presented and their range of validity by contrasting them with the exact many-body solution for a moderate number of atoms and wells was determined.

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